svx: avoid -Werror=deprecated-copy (GCC trunk towards GCC 9)

...by removing explicitly user-provided functions that do the same as their
implicitly-defined counterparts, but may prevent implicitly declared copy
functions from being defined as non-deleted in the future.  (Even if a dtor was
declared non-inline in an include file, the apparently-used implicitly-defined
copy functions are already inline, so why bother with a non-inline dtor.)

Change-Id: Ic8c24977a68d33a0051a74617fb4b4dcc2b664df
Reviewed-on: https://gerrit.libreoffice.org/58094
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

include/sfx2/sidebar/ContextList.hxx

@@ -33,7 +33,6 @@ class ContextList
 {
 public:
     ContextList();
-    ~ContextList();
 
     class Entry
     {

sfx2/inc/preventduplicateinteraction.hxx

@@ -188,13 +188,6 @@ class PreventDuplicateInteraction : private ThreadHelpBase2
                     , m_nMaxCount   (nMaxCount   )
                     , m_nCallCount  (0           )
                 {}
-
-                InteractionInfo(const InteractionInfo& aCopy)
-                    : m_aInteraction(aCopy.m_aInteraction)
-                    , m_nMaxCount   (aCopy.m_nMaxCount   )
-                    , m_nCallCount  (aCopy.m_nCallCount  )
-                    , m_xRequest    (aCopy.m_xRequest    )
-                {}
         };
 
         typedef ::std::vector< InteractionInfo > InteractionList;

sfx2/source/sidebar/ContextList.cxx

@@ -28,10 +28,6 @@ ContextList::ContextList()
 {
 }
 
-ContextList::~ContextList()
-{
-}
-
 const ContextList::Entry* ContextList::GetMatch (const Context& rContext) const
 {
     const ::std::vector<Entry>::const_iterator iEntry = FindBestMatch(rContext);